Automatic door-closing device.



w. E. (BROWN.

AUTOMATIC DOOR CLOSING DEVIUE. APPLICATION FILED MAY 21, 1913.

1,1 14,854, Patented Oct. 27, 1914.

est-' w 8 lm entor:

useful Automatic Door-Closin 'which the following is a speci cation.

' res PATENT OFFICE,

WALTER E. BROWN, OFNEW YORK, Iv, Y., ASSIGNOR TO THE riaELLE COMPANY, orNEW YORK, N. Y., A oonrom'rxou or NEW YORK.

AUTOMATIC DOOR-CLOSING DEVICE.

To all whom it may concern .1

Be it known that I, WALTER E. BROWN, a citizen of the United States, anda resident of New York city, borough of Manhattan, in the county of NewYork and State of New York, have invented certain new and Devices, of

This invention relates to automatic door closing devices, and the objectof my invention is to provide a new and improved automatic door closingdevice, which is especially adapted and designed for automaticallyclosing vertically movable doors for elevator shafts and the like, incase of fire, which device is simple in construction, durable andreliable and effective in action. 1 I In the accompanying drawingsinwhich like letters of reference indicate like parts in all thefigures: Figure 1 is an elevation ofa pair of elevator doors providedwith one embodiment ofmy improvement. Fig. 2 is a horizontalsectionalview on the line aa of Fig. 1. Fig. 3 is an enlarged detail.elevation of the weight, latch and guide rod.

' Fig. 4 is a horizontal view on the line b b of Fig. 3.

The doors 1 and 2 are mounted to slide vertically on guides 3, and areconnected by chains and rods 4 and- 5 attached to the doors and passingover pulleys 6 so thatthe two door sections move toward each other inclosing and from each other in opening. The. doors are so .weightedandbalanced that when opcnedto any desireddegree they remain in position,and so that when openeda comparatively small additional load act ing'onthe upper door causes it to descend and the lower door to rise untiltheir adcontact and the door opening,

jacent edges The matter so far deis completely closed scribed is old andwell known and forms no part of my present invention.

The upper door 1 is provided, at each.

lower corner with an arm7- which extends beyond the side of the door andbeyond the inner edge of a vertical rail 8 which is at right angles tosaid arm. Adjacent to and outside of said -rail a vertical guide rod 9extends from a bracket 10 directly beneath the pulley 6 to a bracket 11projectingifrom the outerside of the rail 8' and on said I'od a weight12 is mounted to slide, freely, said weight being equal to a trifle morethan one half of the weight required to move the up- Specification ofLetters Patent. ,Application filed May 21, 1913. Serial No. 768,948.

Patented Oct. 2'7, 1914.

per door section 1 downward and the lower door section 2 upward. If theweight required to so more the door is fiftylbs. then each weight 12would be about twenty-five lbs. more or less. The weight 12 is providedat its upper end with an arm 13 projecting beyond the edge of the rail 8to such a distance that it is in the path of the arm 7 projectinglaterally from the corresponding lower corner of the door; this arm 13on the .weight being above the arm 7, on the correspoiliding lowercorner of the door. A vertica the rod 9 a latch The sliding weight 12 isprovided with a hooked arm 17 the upper end of which can engage thelatch leverl5 so that this latch can hold the weight in raised position.The hooked arm slides on the plate 14 which thus serves as a guide toprevent the weight from turning on the rod 9. The ends of the two latchlevers 15 opposite the ones'on which the hooked arms 17 of the weightsare suspended are connected by a wire 18 passed over suitable pulleys l9and provided with a fusible piece 20. This wire is drawn so taut as tohold both latch levers in horizontal position, thus keeping both weights"12 raised so that they will be directly beneath the pulleys. The'doorscan be opened and closed manually as usual and will not be interferedwith by the weight as' this isheld higher than the arms 7 on the lowercorners of the upper doors and always looked in place. The wire ispreferably carried up to and below the lintel of the door opening on theloft room side but may be arranged in any other'suitable man- In case ofthe wire 18 melts thus releasing the latches 15 and permitting theweights 12 to drop downward on therods 9 until the arms 13 on saidweights strike against the upper edges of the arms 7 on the lowercorners of the upper door, thereby moving said upper door downwardandthe lower door correspondingly'upward so as to close the door openingcompletely. Of course if the doors are closed when the fusible part ofthe wire melts the weights drop without any additional effect but if thedoors are partly open" or entirely open the released weights, by actingon'the arm 7 on the upper doors move guide plate 14 is provided at rightangles to the rail 8. At the upper end ofthe same downward therebyclosing both doors.

Having described my invention what ll with and adjacent to the guiderail, a'sliding Weight on said guide rod, a latch for holding saidweight raised, a fusible plug controlling said latch and a projection onthe'door extending laterally beyond the door to be in the path of saidweight',.substantially as set forth.

:2. The combination with an i elevator shaft door and vertical guiderails for the of brackets secured on one of said same, guide rails, aguide rod attached to said brackets, a weight mounted to slidevertically on said guide rod, a hook projecting upward from said Weight,a latch for en gagement with said hook, a fusible means for holding saidlatch in position and a laterally projecting part on the door extendinginto the path of said weight, substantially as set forth.

3. The combination with movable elevator shaft door, of vertical guiderails for the same, a vertically sliding weight adjacent one of saidguide rails,

means a vertically means for guiding said weight in its verticalmovement, a projecting plate on' said Weight, a projecting partextending from the door laterally into the path of said projecting plateon the weight and beneath said plate and means for holding said Weightin raised position and a fusible tially as set forth.

a, lhecombination with a Vertically movable elevator shaft door, ofvertical guide rails for the same, brackets secured to one of said guiderails on its the side edge of the door, a vertical guide rod secured tosaid brackets, a Weight mounted to slide vertically on said projectingfrom the top or said weight. and projectingbeyond the edge of the guiderail and an arm on the door extending beyond the edge of the guide railand into the path of said plate on the weight, a latch for hold-' ingthe weight in raised position and a fusible device for holding the latchin place, substantially as set forth, Faigned at New York city in thecounty of New York and State of New York this 19th day of February, A.D. 1918.

"WALTER E. BROVTN.

Witnesses: I i

Hoe-n Pircnnu, Oscar l Gmvz.

for releasing said weight, substanface farthest from,

guide rod, a plate,

